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Cheap flights Ontario to Seattle (Tacoma)

1 passenger, economy

Cheap flights Ontario to Seattle

Compare prices, duration and stops

Frontier Airlines
F9 2275 🔥 Hot deal
23:44
Ontario (ONT)
Tue, 8 sep
2h 49min
Direct
02:33
Seattle, Tacoma (SEA)
Wed, 9 sep +1
151 S$
Frontier Airlines
F9 2275 🔥 Hot deal
00:44
Ontario (ONT)
Thu, 10 sep
2h 56min
Direct
03:40
Seattle, Tacoma (SEA)
Thu, 10 sep
62 S$
Frontier Airlines
F9 2275 🔥 Hot deal
00:44
Ontario (ONT)
Fri, 11 sep
2h 56min
Direct
03:40
Seattle, Tacoma (SEA)
Fri, 11 sep
62 S$
Frontier Airlines
F9 2275 🔥 Hot deal
00:34
Ontario (ONT)
Sun, 20 sep
2h 56min
Direct
03:30
Seattle, Tacoma (SEA)
Sun, 20 sep
80 S$
Frontier Airlines
F9 2275 🔥 Hot deal Best price
00:44
Ontario (ONT)
Sat, 26 sep
2h 56min
Direct
03:40
Seattle, Tacoma (SEA)
Sat, 26 sep
55 S$
Frontier Airlines
F9 2275 🔥 Hot deal
00:44
Ontario (ONT)
Mon, 5 oct
2h 56min
Direct
03:40
Seattle, Tacoma (SEA)
Mon, 5 oct
66 S$
Frontier Airlines
F9 2275
00:44
Ontario (ONT)
Thu, 8 oct
2h 56min
Direct
03:40
Seattle, Tacoma (SEA)
Thu, 8 oct
71 S$
Frontier Airlines
F9 2275
01:06
Ontario (ONT)
Fri, 20 nov
3h 2min
Direct
04:08
Seattle, Tacoma (SEA)
Fri, 20 nov
135 S$

Low price calendar

September 2026
Price chart (September 2026)
min: 55 S$ · max: 181 S$
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55 S$
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Cheap flights Ontario to Seattle

Frontier Airlines
Frontier Airlines
Mon, Tue, Thu, Fri, Sat, Sun
Price from
S$55

Popular destinations from Ontario

All →
ONT
Ontario — San Francisco
United States → United States
SFO
from
S$24
ONT
Ontario — Las Vegas
United States → United States
LAS
from
S$24
ONT
Ontario — Denver
United States → United States
DEN
from
S$40
ONT
Ontario — Oakland
United States → United States
OAK
from
S$43
ONT
Ontario — Houston
United States → United States
HOU
from
S$47
ONT
Ontario — San Jose
United States → United States
SJC
from
S$51
ONT
Ontario — Dallas
United States → United States
DFW
from
S$68
ONT
Ontario — Sacramento
United States → United States
SAC
from
S$85

Popular destinations to Seattle

All →
LAX
Los Angeles — Seattle
United States → United States
SEA
from
S$28
LAS
Las Vegas — Seattle
United States → United States
SEA
from
S$39
DEN
Denver — Seattle
United States → United States
SEA
from
S$42
SFO
San Francisco — Seattle
United States → United States
SEA
from
S$56
SAC
Sacramento — Seattle
United States → United States
SEA
from
S$74
SAN
San Diego — Seattle
United States → United States
SEA
from
S$80
SJC
San Jose — Seattle
United States → United States
SEA
from
S$90
SLC
Salt Lake City — Seattle
United States → United States
SEA
from
S$92

Cheap flights Ontario to Seattle

Interesting facts about the route

Flight time

2h 56min

Distance

1 539 km

Average price

S$71

Most frequent flight

F9 2275

Passenger reviews

No reviews for this route yet

Internet abroad

eSIM · United States

All plans

change

3 GB

data

30

days

S$11

Buy

change

2 GB

data

15

days

S$16

Buy

change

5 GB

data

30

days

S$18

Buy

change

3 GB

data

30

days

S$20

Buy

change

5 GB

data

30

days

S$29

Buy

Frequently Asked Questions

The average ticket price Ontario Seattle is S$71. Check flight options below for current prices.
The average flight time is 2 hours 56 minutes.
Flights on the Ontario - Seattle route are operated by the following airlines: Frontier Airlines.
The distance from Ontario to Seattle is 1539 km.